package org.example.xls.tool;

import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;


/**
 * jwt拦截器
 */
@Component
@Slf4j
public class JwtTokenInterceptor implements HandlerInterceptor {
    /**
     * 校验jwt
     */
    public boolean preHandle (HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info("进入拦截器");
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        //1、从请求头中获取令牌
        String token = request.getHeader("token");
        log.info("token:{}",token);
        //2、校验令牌
        try {
            Claims claims = JwtUtil.parseJWT(token);
            String openid=claims.get("openid").toString();
            //将校验得到的openid保存到ThreadLocal线程局部变量中
            TheadLocalUtil.setThreadLocal(openid);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            log.error("解析JWT失败:{}", ex.getMessage());
            response.setStatus(401);
            return false;
        }
    }
}
